I agree ongoing updates is a problem. However, unlike in 2013 or 2010 or previous, web technologies have stabilised and matured - HTML5, CSS3, ECMAScript 6, websockets, webgl and so on. So, a good port now should last a long time even if it didn't get regular support. Also the guys I work with maintain official webkit ports for a major embedded platform so hopefully that work could sustain ongoing updates.